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Thu, 28 Nov 2024 08:38:02 -0800 (PST) From: Bryan O'Donoghue Date: Thu, 28 Nov 2024 16:38:00 +0000 Subject: [PATCH v5 1/3] clk: qcom: gdsc: Capture pm_genpd_add_subdomain result code Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Message-Id: <20241128-b4-linux-next-24-11-18-clock-multiple-power-domains-v5-1-ca2826c46814@linaro.org> References: <20241128-b4-linux-next-24-11-18-clock-multiple-power-domains-v5-0-ca2826c46814@linaro.org> In-Reply-To: <20241128-b4-linux-next-24-11-18-clock-multiple-power-domains-v5-0-ca2826c46814@linaro.org> To: Bjorn Andersson , Michael Turquette , Stephen Boyd , Dmitry Baryshkov Cc: linux-arm-msm@vger.kernel.org, linux-clk@vger.kernel.org, linux-kernel@vger.kernel.org, Bryan O'Donoghue , stable@vger.kernel.org X-Mailer: b4 0.15-dev-355e8 Adding a new clause to this if/else I noticed the existing usage of pm_genpd_add_subdomain() wasn't capturing and returning the result code. pm_genpd_add_subdomain() returns an int and can fail. Capture that result code and throw it up the call stack if something goes wrong. Fixes: 1b771839de05 ("clk: qcom: gdsc: enable optional power domain support= ") Cc: stable@vger.kernel.org Reviewed-by: Bjorn Andersson Signed-off-by: Bryan O'Donoghue --- drivers/clk/qcom/gdsc.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/drivers/clk/qcom/gdsc.c b/drivers/clk/qcom/gdsc.c index fa5fe4c2a2ee7786c2e8858f3e41301f639e5d59..4fc6f957d0b846cc90e50ef243f= 23a7a27e66899 100644 --- a/drivers/clk/qcom/gdsc.c +++ b/drivers/clk/qcom/gdsc.c @@ -555,9 +555,11 @@ int gdsc_register(struct gdsc_desc *desc, if (!scs[i]) continue; if (scs[i]->parent) - pm_genpd_add_subdomain(scs[i]->parent, &scs[i]->pd); + ret =3D pm_genpd_add_subdomain(scs[i]->parent, &scs[i]->pd); else if (!IS_ERR_OR_NULL(dev->pm_domain)) - pm_genpd_add_subdomain(pd_to_genpd(dev->pm_domain), &scs[i]->pd); + ret =3D pm_genpd_add_subdomain(pd_to_genpd(dev->pm_domain), &scs[i]->pd= ); + if (ret) + return ret; } =20 return of_genpd_add_provider_onecell(dev->of_node, data); --=20 2.45.2 From nobody Mon Feb 9 19:54:50 2026 Received: from mail-wm1-f50.google.com (mail-wm1-f50.google.com [209.85.128.50]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 8E6241C07E3 for ; 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Thu, 28 Nov 2024 08:38:04 -0800 (PST) Received: from [127.0.1.1] ([176.61.106.227]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-434aa78c202sm57990155e9.26.2024.11.28.08.38.03 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 28 Nov 2024 08:38:04 -0800 (PST) From: Bryan O'Donoghue Date: Thu, 28 Nov 2024 16:38:01 +0000 Subject: [PATCH v5 2/3] clk: qcom: common: Add support for power-domain attachment Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Message-Id: <20241128-b4-linux-next-24-11-18-clock-multiple-power-domains-v5-2-ca2826c46814@linaro.org> References: <20241128-b4-linux-next-24-11-18-clock-multiple-power-domains-v5-0-ca2826c46814@linaro.org> In-Reply-To: <20241128-b4-linux-next-24-11-18-clock-multiple-power-domains-v5-0-ca2826c46814@linaro.org> To: Bjorn Andersson , Michael Turquette , Stephen Boyd , Dmitry Baryshkov Cc: linux-arm-msm@vger.kernel.org, linux-clk@vger.kernel.org, linux-kernel@vger.kernel.org, Bryan O'Donoghue X-Mailer: b4 0.15-dev-355e8 Right now we support one power-domain per clock controller. These single power-domains are switched on by the driver platform logic. However when we have multiple power-domains attached to a clock-controller that list of power-domains must be handled outside of driver platform logic. Use devm_pm_domain_attach_list() to automatically hook the list of given power-domains in the dtsi for the clock-controller driver. Signed-off-by: Bryan O'Donoghue --- drivers/clk/qcom/common.c | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/drivers/clk/qcom/common.c b/drivers/clk/qcom/common.c index 33cc1f73c69d1f875a193aea0552902268dc8716..e6a024e95ab5f4b0776ffc6c7b3= bebfbebb007fd 100644 --- a/drivers/clk/qcom/common.c +++ b/drivers/clk/qcom/common.c @@ -22,6 +22,7 @@ struct qcom_cc { struct qcom_reset_controller reset; struct clk_regmap **rclks; size_t num_rclks; + struct dev_pm_domain_list *pd_list; }; =20 const @@ -294,11 +295,19 @@ int qcom_cc_really_probe(struct device *dev, struct clk_regmap **rclks =3D desc->clks; size_t num_clk_hws =3D desc->num_clk_hws; struct clk_hw **clk_hws =3D desc->clk_hws; + struct dev_pm_domain_attach_data pd_data =3D { + .pd_names =3D 0, + .num_pd_names =3D 0, + }; =20 cc =3D devm_kzalloc(dev, sizeof(*cc), GFP_KERNEL); if (!cc) return -ENOMEM; =20 + ret =3D devm_pm_domain_attach_list(dev, &pd_data, &cc->pd_list); + if (ret < 0 && ret !=3D -EEXIST) + return ret; + reset =3D &cc->reset; 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charset="utf-8" Content-Transfer-Encoding: quoted-printable Message-Id: <20241128-b4-linux-next-24-11-18-clock-multiple-power-domains-v5-3-ca2826c46814@linaro.org> References: <20241128-b4-linux-next-24-11-18-clock-multiple-power-domains-v5-0-ca2826c46814@linaro.org> In-Reply-To: <20241128-b4-linux-next-24-11-18-clock-multiple-power-domains-v5-0-ca2826c46814@linaro.org> To: Bjorn Andersson , Michael Turquette , Stephen Boyd , Dmitry Baryshkov Cc: linux-arm-msm@vger.kernel.org, linux-clk@vger.kernel.org, linux-kernel@vger.kernel.org, Bryan O'Donoghue X-Mailer: b4 0.15-dev-355e8 When a clock-controller has multiple power-domains we need to attach parent GDSCs in that clock-controller as subdomains of each of the power-domains. Testing on the x1e80100 reference shows that both power-domains need to be switched on for the GDSCs in the clock-controller to work. Some open questions remain. 1. Should there be a hirearchy of power-domains in the clock-controller. 2. If there should be no hirearchy should the parent GDSC inside the clock-controller attach to each power-domain in the clock-controller. 3. If there are multiple parent GDSCs in a clock-controller do we attach those top-level GDSCs to each controller power-domain. 4. Finally should performance-states be applied equally across those power-domains. It may be if we see more clock-controllers with multiple power-domains that some mixture of these questions will need to be implemented for specific hardware. Right now the approach taken here is to attach the clock-controller GDSC parent to each clock-controller power-domain. Signed-off-by: Bryan O'Donoghue --- drivers/clk/qcom/common.c | 1 + drivers/clk/qcom/gdsc.c | 35 +++++++++++++++++++++++++++++++++++ drivers/clk/qcom/gdsc.h | 1 + 3 files changed, 37 insertions(+) diff --git a/drivers/clk/qcom/common.c b/drivers/clk/qcom/common.c index e6a024e95ab5f4b0776ffc6c7b3bebfbebb007fd..2976e360ed383f148995efcebbf= 73e2ebc917c83 100644 --- a/drivers/clk/qcom/common.c +++ b/drivers/clk/qcom/common.c @@ -327,6 +327,7 @@ int qcom_cc_really_probe(struct device *dev, scd->dev =3D dev; scd->scs =3D desc->gdscs; scd->num =3D desc->num_gdscs; + scd->pd_list =3D cc->pd_list; ret =3D gdsc_register(scd, &reset->rcdev, regmap); if (ret) return ret; diff --git a/drivers/clk/qcom/gdsc.c b/drivers/clk/qcom/gdsc.c index 4fc6f957d0b846cc90e50ef243f23a7a27e66899..cb4afa6d584899f3dafa380d5e0= 1be6de9711737 100644 --- a/drivers/clk/qcom/gdsc.c +++ b/drivers/clk/qcom/gdsc.c @@ -506,6 +506,36 @@ static int gdsc_init(struct gdsc *sc) return ret; } =20 +static int gdsc_add_subdomain_list(struct dev_pm_domain_list *pd_list, + struct generic_pm_domain *subdomain) +{ + int i, ret; + + for (i =3D 0; i < pd_list->num_pds; i++) { + struct device *dev =3D pd_list->pd_devs[i]; + struct generic_pm_domain *genpd =3D pd_to_genpd(dev->pm_domain); + + ret =3D pm_genpd_add_subdomain(genpd, subdomain); + if (ret) + return ret; + } + + return 0; +} + +static void gdsc_remove_subdomain_list(struct dev_pm_domain_list *pd_list, + struct generic_pm_domain *subdomain) +{ + int i; + + for (i =3D 0; i < pd_list->num_pds; i++) { + struct device *dev =3D pd_list->pd_devs[i]; + struct generic_pm_domain *genpd =3D pd_to_genpd(dev->pm_domain); + + pm_genpd_remove_subdomain(genpd, subdomain); + } +} + int gdsc_register(struct gdsc_desc *desc, struct reset_controller_dev *rcdev, struct regmap *regmap) { @@ -558,6 +588,9 @@ int gdsc_register(struct gdsc_desc *desc, ret =3D pm_genpd_add_subdomain(scs[i]->parent, &scs[i]->pd); else if (!IS_ERR_OR_NULL(dev->pm_domain)) ret =3D pm_genpd_add_subdomain(pd_to_genpd(dev->pm_domain), &scs[i]->pd= ); + else if (desc->pd_list) + ret =3D gdsc_add_subdomain_list(desc->pd_list, &scs[i]->pd); + if (ret) return ret; } @@ -580,6 +613,8 @@ void gdsc_unregister(struct gdsc_desc *desc) pm_genpd_remove_subdomain(scs[i]->parent, &scs[i]->pd); else if (!IS_ERR_OR_NULL(dev->pm_domain)) pm_genpd_remove_subdomain(pd_to_genpd(dev->pm_domain), &scs[i]->pd); + else if (desc->pd_list) + gdsc_remove_subdomain_list(desc->pd_list, &scs[i]->pd); } of_genpd_del_provider(dev->of_node); } diff --git a/drivers/clk/qcom/gdsc.h b/drivers/clk/qcom/gdsc.h index 1e2779b823d1c8ca077c9b4cd0a0dbdf5f9457ef..dd843e86c05b2f30e6d9e978681= 580016333839d 100644 --- a/drivers/clk/qcom/gdsc.h +++ b/drivers/clk/qcom/gdsc.h @@ -80,6 +80,7 @@ struct gdsc_desc { struct device *dev; struct gdsc **scs; size_t num; + struct dev_pm_domain_list *pd_list; }; =20 #ifdef CONFIG_QCOM_GDSC --=20 2.45.2